John baker



JOHN BAKER, OF PHILADELPHIA, PENNSYLVANIA.

Letters Patent No. 74,278, dated February 11, 1868.

IMPROVEMENT IN MACHINE POR CUTTING IGEi tlge gagnait aferra tu in tlgest ttttrts ntmt mit mating part nt the sans.

TO ALL WI-IOM IT MAY CONCERN: i d

Be it known that I, JOHN BAKER, of Philadelphia, in the county of Philadelphia, and State of Pennsylvania., have invented certain new and useful Improvements in Ice-Cutting Machines; and I d o hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specification, and to the letters of reference marked thereon,` like letters indicating like parts wherever they occur. Y v

To enable others skilled in the art to construct and use my invention, I will proceed to describe it.

My invention consists in the constructing of a machine, to be propelled by a steam-engine, and`which, as it travels over the ice, shall operate circular saws at its rear to cut the ice as it moves.

Figure 1 is a side elevation, i

Figure 2 an end view, and

Figure 3 a longitudinal vertical section. I

I construct a carriage of any suitable size and style, and mount thereon a steain-cngine, as represented in the drawings, in which A represents the body, and C an oscillating cylinder, having its piston attached to and; operating the driving-wheels D--there being another set of wheels, I3, to support the front portion of-tho carriage-the wheels D being provided with spurs or projections on their periphery, to enableY them to take hold on the ice, and prevent slipping. Near the rear end of the' machine, a frame, F, is arranged to slide vertically, this frame being arranged to extend down on cachV side ofthe carriage, and supporting at its lower end the ends of a horizontal shaft,f, on which is secured, at each side of' the carriage, a circular saw, E. From the shaft of the driving-wheels D a band passcsiarcund the shaft f, on which thc saws are mounted, so` that as the wheels D revolve to propel the machine, motion is thereby imparted tothe saws. The frame F is provided with a. screw, z, or other suitable means for adjusting it vertically, and thereby to raise or lower the saws to eut more er less deep, or to elevate thcmentirelyl above the ice, as may be desired. It will of course be necessary to have the machine so geared as to cause the saws to revolve much more rapidly than the wheels D, and it is obvious thatv instead of abelt, gearing may be used it' preferred. i

In order to elevate the wheels so that the machine may be turned, I locate under its centre a lever-jack, having its lower portion, a, rounded, as shown in iig. 2, and having its upper portion pivotcd in the machine or carriage, sovthat when the lever e is depressed the carriage will he raised and rest ou the part a, and when thus raised the machine may be turned on the pivot.

Withva machine constructed and operating on the plan thus described, it willbe seen that the ice can be cut with great rapidity and ease.

Having thus described my invention,what I claim, is-

1. A tractiowengine, carrying and operating saws for cutting ice, substantially as described. l 2. So arranging the saws E, in connection with the ice-eutting machine, that they may be adjusted vertically, for cutting to a greater or less depth, as may be desired, substantially as set forth.

3. The swivelled lever-jack a, located under the body of thc machine, in such a position and manner that the machine may be raised and turned thereon, substantially as set forth.

JOI-IN BAKER.

Witnesses: t

A. II. TrrrLv, Lewis II. TnnmLE. 

